Matrix: Grund/d_dyn1

Description: Unsymmetric Matrix d_dyn1, F. Grund, Oct 1995.

Grund/d_dyn1 graph Grund/d_dyn1 graph
(bipartite graph drawing) (graph drawing of A+A')

Grund/d_dyn1 dmperm of Grund/d_dyn1

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  • Matrix group: Grund
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  • download as a MATLAB mat-file, file size: 2 KB. Use UFget(463) or UFget('Grund/d_dyn1') in MATLAB.
  • download in Matrix Market format, file size: 1 KB.
  • download in Rutherford/Boeing format, file size: 2 KB.

    Matrix properties
    number of rows87
    number of columns87
    structural full rank?yes
    structural rank87
    # of blocks from dmperm17
    # strongly connected comp.1
    explicit zero entries6
    nonzero pattern symmetry 8%
    numeric value symmetry 2%
    Cholesky candidate?no
    positive definite?no

    authorF. Grund
    editorF. Grund
    kindchemical process simulation problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD927
    Cholesky flop count1.5e+04
    nnz(L+U), no partial pivoting, with AMD1,767
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD238
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD435

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 6 explicit zero entries.

    SVD-based statistics:
    null space dimension0
    full numerical rank?yes

    singular values (MAT file):click here
    SVD method used:s = svd (full (A)) ;

    Grund/d_dyn1 svd

    For a description of the statistics displayed above, click here.

    Maintained by Tim Davis, last updated 12-Mar-2014.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.